482 COMPOSITAE. Vou. IIL. 
12. Helianthus Maximiliani Schrad. Maxi- 
milian’s Sunflower. Fig. 4472. 
Helianthus Maximiliani Schrad. Ind. Sem. Hort. Goett. 
1338. 
Perennial by fleshy roots and thickened rootstocks ; 
stems stout, scabrous or hispid below, 2°-12° high. 
Leaves sessile or short-petioled, long-lanceolate, fold- 
ing in drying, alternate or the lower opposite, very 
rough on both sides, rigid, acuminate or acute at 
both ends, denticulate or entire, 3-7’ long, 3’-13’ 
wide; heads few or numerous, 2’-3’ broad on stout 
densely rough-pubescent peduncles; involucre hemi- 
spheric, its bracts lanceolate, acuminate, squarrose, 
densely strigose-pubescent, often 9” long; disk yel- 
lowish; rays 15-30; chaff linear, acute, pubescent 
above; achenes linear-oblong, glabrous or nearly so; 
pappus commonly of 2 lanceolate awns. 
On dry prairies, Minnesota and Manitoba to Sas- 
katchewan, Missouri, Nebraska and Texas. Locally 
adventive eastward. Aug.—Oct. 
13. Helianthus Dalyi Britton. Judge 
Daly’s Sunflower. Fig. 4473. 
Helianthus Dalyi Britton, Journ. N. Y. Bot. 
Gard. 2: 89. 1901. : 
Perennial by a fusiform tuber 1’-1}’ 
long; stem slender, simple, roughish, ap- 
pressed-pubescent, about 2° high. Leaves 
firm, conduplicate, drooping, finely rough- 
pubescent on both sides, narrowly lanceo- 
late, acuminate at both ends, distantly ser- 
rate with low teeth, the larger about 4’ 
long and 7” wide, all opposite or the up- 
permost alternate; heads usually solitary 
and long-peduncled, rarely 2, about 32’ 
broad; involucral bracts narrowly lanceo- 
late with long subulate tips; rays acute; 
. pappus 2 subulate awns; chaff of the re- 
ceptacle pubescent at the acute apex. 
On a dry bank, Sag Harbor, New York. Sept. 
14. Helianthus subtuberésus Bourgeau. 
Indian Potato. Fig. 4474. 
H. giganteus subtuberosus (Bourgeau) Britton, in 
Britt. & Brown, Ill. Fl. 3: 425. 1898. 
H. subtuberosus Bourgeau; Britton, Manual 993. 
1901. 
Fleshy roots, thick and edible. Leaves thick, 
more or less serrate, all or all but the upper dis- 
tinctly petioled, sometimes all opposite, 23’-5’ 
long, acuminate at the apex, mostly narrowed at 
the base, the petioles ciliate; heads not very nu- 
merous; bracts of the involucre lanceolate, acumi- 
nate, densely pubescent and white-ciliate, about 
8” long; rays 1’-12’ long. 
Dry soil, Michigan and Minnesota to Saskatche- 
wan, Montana and Wyoming. Aug.—Sept. 
Helianthus Rydbergi Britton, of western Ne- 
braska, differs by broader, ovate-lanceolate leaves, 
rather abruptly narrowed at the base. 
